Customer reviews from Stanley12volt.com
Stanley - FATMAX Portable Car Jump Starter, 120 PSI Air Compressor, USB Power Bank, 1500-Amp Peak, LED Light
Average customer rating
4.8
(48 Reviews)
Rating breakdown 48 reviews
5 Stars
41
4 Stars
6
3 Stars
1
2 Stars
0
1 Star
0
Customer Reviews for Stanley - FATMAX Portable Car Jump Starter, 120 PSI Air Compressor, USB Power Bank, 1500-Amp Peak, LED Light
Customer Rating
5
Great and reliable!
on February 20, 2026
Posted by: PeshangO
[This review was collected as part of a promotion.] This has been really good for me since I’m always working on cars and always having battery trouble! It’s super reliable and durable, with the air compressor built in it makes it 100x better. Two in one why not? Overall an amazing product to have, does its job very well and is powerful.
Also I accidentally drover over it the second week of having it. But still working like a champ!
Written by a customer while visiting Stanley12volt.com
Customer Rating
4
Useful and reliable jump starter!
on January 19, 2026
Posted by: brayantr_9830
[This review was collected as part of a promotion.] This jump starter and compressor is pretty good! It has a lot of power so it can jump start your car and keep it alive for longer compared to other small jump starters! I also like that it comes with an air compressor, LED light, and usb/usb c charging if you need it. Only issue for me would be how huge it is other than that I would still recommend! Using the air compressor is also a bit loud but it doesn't bother me!
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
Versatile jumper
on January 13, 2026
Posted by: larryk5_6590
[This review was collected as part of a promotion.] The Stanley fatmax is ahead of its time with a well built durable tough and rugged outer shell that has a nice inflation cord size. The Stanley fatmax doesn't overheat when using tire inflator and it pushes psi out at a fairly fast pace.
No foul odor or smell and the air comes out fresh . Great jump starter and tire inflator. Overall a great addition to my tool collection of good things to have.
No foul odor or smell and the air comes out fresh . Great jump starter and tire inflator. Overall a great addition to my tool collection of good things to have.
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
Great to keep in my SUV, especially during the col
on December 5, 2025
Posted by: julial_9736
[This review was collected as part of a promotion.] This is perfect to store in my car, especially during the winter in the northeast when the weather turns frigid and my car battery has a tendency to struggle to start. As a woman, this is easy for me to lift on my own and it has a built-in handle on the top. It required minimal assembly, which I appreciated, and is easy to plug in and charge prior to storing in my car (or using). I’ve also been able to use it to put air in my car tires, which became low because of the colder weather; it didn’t create a lot of noise during this. I like that this product is multi-functional and saves me the trouble of being stranded on the side of the road or in a parking lot in the cold, or needing to worry about driving with low air pressure in my tires. I think this is a great value for what it delivers, and as long as I remember to keep it charged and in the trunk of my car, I can have more peace of mind whenever I’m out driving—especially during the colder months!
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
Fantastic backup in case of a bad day!
on December 2, 2025
Posted by: paoloc4_2832
[This review was collected as part of a promotion.] This thing is pretty awesome! I love that it has everything you might need in case something goes wrong with your car. However, the battery doesn’t last long and it drains on its own in the cold. Nice and compact so it’s easy to lug around. Cables tie into the machine in its own so it’s nice and organized. Seems like I could throw it off a rooftop and nothing would happen to it.
Written by a customer while visiting Stanley12volt.com
Customer Rating
5
You need this, I need this, everyone needs this
on December 2, 2025
Posted by: mejpye_1549
[This review was collected as part of a promotion.] I am so glad to have this Stanley Fatmax jump-starter with air compressor. It worked great the other night when I had a dead battery in my car. It's so handy--no jockeying around trying to get two cars close enough for a jump-start. With this portable unit you can jump-start wherever your car sits. The 1500 amp is powerful enough to start my car with completely dead battery. I love the bright LCD screen that easily shows you the info you need like how much charge the unit has. There is a power knob to turn the jump-start feature on and off to help prevent accidents. The metal clamps are powder coated and very durable. The charging port is easy to use and plugs into a regular household outlet. There are also two usb ports--type C and type A--which is a great bonus. On top of all this, the Fatmax also has an air compressor. It is strong and inflated the tires on my car. There's a nice compartment for the hose to keep everything neat and tidy when not in use. The nozzle worked great on my valve stems. It also comes with a sports needle. On the back of the unit is an LED light that is great to have when dealing in darker conditions. I am so happy to have this high-quality, every-detail-covered product from Stanley. It has already helped me out of a tough situation and made routine things like airing up my tires when the weather turns cold so much more simple and comfortable to take care of.
Written by a customer while visiting Stanley12volt.com
Customer Rating
3
Long Charge Time
on December 1, 2025
Posted by: dannye14_9355
[This review was collected as part of a promotion.] The Stanley Fatmax Jump Starter with Air Compressor is small enough to fit in the storage compartment beneath the backseat of my truck.
It works well for a quick battery charge or when I need to air up a tire.
I like it fine, but it takes 40 hours to completely charge the battery, and it doesn’t really hold a charge as long as I thought it would.
The charging cables are very short, and I feel like they should be longer so I don’t have to set the charger on my truck fender or in the engine compartment.
It works well for a quick battery charge or when I need to air up a tire.
I like it fine, but it takes 40 hours to completely charge the battery, and it doesn’t really hold a charge as long as I thought it would.
The charging cables are very short, and I feel like they should be longer so I don’t have to set the charger on my truck fender or in the engine compartment.
Written by a customer while visiting Stanley12volt.com
Customer Rating
4
Big boi to the rescue!
on November 30, 2025
Posted by: wanh96_7369
[This review was collected as part of a promotion.] Big and heavy jump starter but it is for sure more than enough for bigger needs. We actually used it real quick on our car that died over a cold front lol and it worked very very well. Easy interface and straight forward. One thing I would change is to have an on/off button for air compressor as well. Scared me when I accidentally pressed on it thinking if it's off then "everything" is off.
Written by a customer while visiting Stanley12volt.com